Check the internals and make sure you have a good bumper on your bolt guide. You may be getting metal on metal contact somewhere. That's if you mean mechanical kick. If you have a lot of barrel rise then you may need to run a higher dwell as suggested. If you're using a really lite setup(hopper, barrel, tank), barrel rise will also increase.
ETEK 3LT, with 14" Ti boomstick and cure 3 + bolt F/S
Vanguard creed eyes, membrane, bolt pin, detents, gaskets, schraders, orings and more F/s[/color]
Old school angel poppets/cup seals(LCD and A4/speed), spring detents(not sure which models) F/S